It is the Tidecasters who conjure the phantasmal sea that allows aelf and aquatic beast to move and breathe as if they were in their own natural environment.
Tyranid Warriors are the most adaptable of all the Hive Mind’s bioforms. They are efficient killing machines with the ability to employ a wide variety of bio-weapon symbiotes. On the battlefield they are found fighting in both close quarters and at long range, and form a vital link in the Tyranid swarm, acting as relays through which the Hive Tyrants issue their commands.